diff --git a/Include/bytesobject.h b/Include/bytesobject.h
index e9c319c..49d1d38 100644
--- a/Include/bytesobject.h
+++ b/Include/bytesobject.h
@@ -33,7 +33,7 @@
 
 /* Type check macros */
 #define PyBytes_Check(self) PyObject_TypeCheck(self, &PyBytes_Type)
-#define PyBytes_CheckExact(self) (Py_Type(self) == &PyBytes_Type)
+#define PyBytes_CheckExact(self) (Py_TYPE(self) == &PyBytes_Type)
 
 /* Direct API functions */
 PyAPI_FUNC(PyObject *) PyBytes_FromObject(PyObject *);
@@ -45,7 +45,7 @@
 
 /* Macros, trading safety for speed */
 #define PyBytes_AS_STRING(self) (assert(PyBytes_Check(self)),((PyBytesObject *)(self))->ob_bytes)
-#define PyBytes_GET_SIZE(self)  (assert(PyBytes_Check(self)),Py_Size(self))
+#define PyBytes_GET_SIZE(self)  (assert(PyBytes_Check(self)),Py_SIZE(self))
 
 #ifdef __cplusplus
 }